Printer s quoin



1 and C. The piece A is the sliding way-piece,

RICHARD'ATWATER, OF MERIDEN, CONNECTICUT.

PRINTERS QUOIN.

SPECIFICATION forming partof Letters Patent No. 340,475, dated April 20,18 S6.

Application filed May 26, 1885.

T 0 @ZZ whom, it may concern.-

Be it known that l, RICHARD ATWATER, of Meriden, in the county of NewHaven and State of Connecticut, have invented a new and usefulImprovement in Printers Quoins; and I hereby declare the following to bea full and clear description of the same.

rlhe object of this invention is to construct a quoin in threepieces-viz., a sliding way, a wedge, and a follower, the whole united bya transverse rod or rivet in such a manner as to allow the wedge toslide longitudinally loetween its sliding way and the follower, and thustighten the quoin in place in the chase, the quoin being provided with acogged rack and a pinioned key for moving the wedge in its seat betweenthe way-piece and the follower, thereby obviating the necessity ofstriking the wedge and hammering it into place.

The details and nature of the invention will be readily understood bythe subjoined description, and by the accompanying drawings, of which-Figure l is a plan ofthe improved quoin in its closed position. Fig. 2is a plan of the quoin in its open position. Figs. 3, 4, and 5 arerespectively plans of the edges of the three separate and respectivepieces of which the quoin is composed. In these detached views the edgesof the said pieces are shown in the same positions in which they areshown in Figs. l and 2. Fig. 6 is a face view of the inside of theway-piece, and showing its cogged rack. Fig. 7 is a plan of thetransverse face of the wedge-piece. Fig. 8 is a plan of the inner faceof the follower-piece. Fig. 9 is a transverse section of the wholequoin, taken through the assemblingrivehon the line a: fr of Fig. 1.Figs. l0 and l1 are respectively a plan and end elevation of the key fortightening the wedge.

The quoin is composed of three pieces, A, B,

and is of the same width at both its ends. The piece B is thewedge-piece, and of course itis made thicker at one end than the other.The

piece C is the follower, and it is,like the wedge, made thicker at oneend than the other, so that when the whole of these three parts are 5oassembled together, as in Figs. l and 2, the

Serial No. 166,710. (No model.)

exterior faces of the way-piece A and the follower-piece C are nearly orquite parallel.

The interior face of the way-piece is provided with a cogged rack, a, asshown in Figs. 3 and 6. It also has near its forward end aninwardly-projecting lug, a, as is also shown in said Figs. 3 and 6.

The wedge-piece B has its central part excavated, so as to form atransverse slot or mortise, b, which extends quite through the saidpiece for nearly its entire length, as is shown in Fig. 7. Near thewider end of the said wedgepiece it has a transverse chamber or cavity,b', of semi-cylindrical formation, eX- tending nearly across its face,which is placed next the cogged rack of the way-piece. A

turning key or winch, D, has its lower endl made in the form of a coggedpinion, d, which is adapted to enter the cavity or chamber b', and bethereby held in place relatively to the other parts, and while thereinseated to engage with the teeth of the cogged rack a, so that byrotating the said key or winch by means of its handles d d2 thewedge-piece B is shoved or moved forward on its sliding wayand betweenit andthe follower C. The follower C is also made in a wedge-shapedform, as shown in Figs. 1, 2, and 5, and it, like the piece A, has aninwardly-projecting lug on its inner face and near its wider end.Thislug c, aswell as thebefore-mentionedluga,is adapted to enter theslot b of the wedge-piece, and by those lugs and the central mortise, b,in which they engage, serves to hold the three pieces laterally in theirrelative positions each to the other at that point. An assembling pin orrivet, E, passesxthrough the three pieces A B C at the central part ofthe lug c and holds the three said pieces together. This rivet or pin isnot riveted up tightly to the parts A and C, but its head is placed inadeeply-sunk countersink or cavity, c', in the outer face of the pieceC, and so loosely holds the parts together, as shown in Fig. 9, thuspermitting a full stroke of the wedge-piece B, and a consequentseparation of the pieces A and C.

By putting the key or winch in its seat b', with'its toothed or pinionedend in the teeth of the rack @,and turning the said key or winch,

it rolls ahead or back, as the case may be, on 10o the said cogged rack,and thus pushes the wedge ahead between its way-piece and the follower,or draws the wedge back, and thns the quoin is tightened or loosened inits place in the chase.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. A quoin formed of a straight way-piece, with a cogged rack on itsinterior face, a wedge ehambered transversely for nearly its entirelength,and a tapering follower-piece, the whole held in proper relativeposition each to the other by means of inwardly-projecting lugs on theadjacent faces of the two outer pieces and the central slot of theintervening wedge-piece, into which the said lugs engage, the whole heldtogether by a transverse rivet or bar, which holds the parts looselytogether, substantially as shown and set forth.

2. The parallel-sided way-piece A, cogged on its interior face, and alsoprovided with an inwardly-projecting lug, a, near one of its ends on thesame face, the tapering followero, c, near its wider end, and thecentral wedge, B, ehalnbered for nearly its entire length, for thelongitudinal movement therein of' the said interlocking lugs a and c,the whole combined as described and set forth.

3. In a quoin, a sliding wedge seated between a parallel-sided slidingway and a tapering follower-bloek, the Way-piece and the followerattached together by a connecting bar or rivet, which passes throughaeentral longitudinal slot in the wedge, said quoin being adapted to beoperated by a turning key or winch fitted into an aperture or notch inthe wedge, and arranged to engage with a cogged rack on theway-piece,substantially as shown and set forth.

In witness whereof I have hereunto set my hand this 18th day of May,1885.

RICHARD ATVVATER.

piece C, with a similar lun'

